---
title: GoodThopter11
---
<h1>GoodThopter11</h1>

<p>The GoodThopter11 is a sexy GoodFET CAN device based around the
design of the <a href="/hardware/goodfet31/">GoodFET31</a>. Unlike the
general- purpose GoodFET boards, the purpose of this board is to be
used in the exploration of Automotive communication buses, currently
supporting only the CAN bus. In addition to GF31 circuitry we have
added a high-speed CAN Transceiver (MCP2551) and a Stand-alone CAN
Controller with a SPI Interface (MCP2515).  This design improves upon
the <a href="/hardware/goodthopter10/">GoodThopter10</a> by correcting
one important and many minor errata.
</p>


<p><a href="http://www.flickr.com/photos/travisgoodspeed/7799398280/" title="GoodThopter10 by Travis Goodspeed, on Flickr"><img src="http://farm9.staticflickr.com/8289/7799398280_d1093d3ce5.jpg" width="500" height="282" alt="GoodThopter10"></a></p>

<h2>CAD Files</h2>

<p>Eagle CAD 6.x files for the design can be found in
/branches/goodthopter11 of the GoodFET subversion repository, or along
with gerbers as
<a href="/releases/goodthopter11.zip">goodthopter11.zip</a>.</p>

<h2>Bill of Materials</h2>

<p>Resistor values can be approximated.</p>

<p><b>N.B., The BOM including Digi-Key part numbers can be found in SVN branches/goodthopter10/bom/ (GoodThopter11 uses the same components)</b></p>

<p><table border="1">
<tr><td>Quantity</td><td>Package</td><td></td></tr>
<tr><td>1</td><td>SSOP28</td><td><a href="http://www.ftdichip.com/Products/FT232R.htm">FT232RL</a></td></tr>
<tr><td>1</td><td>TSSOP38</td><td><a href="http://www.ti.com/product/msp430f2274">MSP430F2274</a></td></tr>
<tr><td>1</td><td>TSSOP20</td><td><a href="http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010406">MCP2515</a></td></tr>
<tr><td>1</td><td>SOIC8</td><td><a href="http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010405">MCP2551</a></td></tr>
<tr><td>1</td><td>HC49/UP**</td><td>20MHz SMD Crystal, 15pF</td></tr>
<tr><td>4</td><td>0603</td><td>0.1&mu;F Decoupling Capacitors</td></tr>
<tr><td>2</td><td>0603</td><td>15pF Capacitors*</td></tr>
<tr><td>5</td><td>0603</td><td>0603 LED</td></tr>
<tr><td>4</td><td>0603</td><td>330R LED Series Resistors</td></tr>
<tr><td>1</td><td>0603</td><td>10K Pull-up Resistor</td></tr>
<tr><td>1</td><td></td><td>USB Type B - TE 292304-2 or FCI 61729-1011BLF</td></tr>
<tr><td>1</td><td></td><td>D-SUB 9 Position Mountable Conn. - TE 1734351-1</td></tr>
</table>
</p>

<p>* These should match the required capacitance of the crystal.</p>
<p>** The /US SMD package works as an alternative.</p>

<h2>Construction</h2>

<p>Place the components as shown in the comments of this Flickr image.
As this is a surface-mount design, be sure that you are familiar with
such techniques or have assistance before beginning assembly.</p>

<a href="http://www.flickr.com/photos/travisgoodspeed/7799398280/" title="GoodThopter10 on Flickr"><img src="http://farm9.staticflickr.com/8289/7799398280_d1093d3ce5.jpg" width="500" height="282" alt="GoodThopter10"></a>

<p>See the <a href="http://goodfet.sourceforge.net/tutorial/">GoodFET
Tutorial</a> for more detailed explanations.</p>

<h2>Usage</h2>

<p>Build and flash firmware with the following commands.  This board
self-flashes over USB through a masked-ROM bootloader, so there is no
need for an external programmer.</p>

<p><pre>export board=goodthopter11
make clean install
goodfet.mcpcan info
</pre></p>

<p>See the <a href="http://goodfet.sourceforge.net/tutorial/">GoodFET
Tutorial</a> for more detailed explanations.</p>


<h2>Errata</h2>

<h3>OBD2 Cable</h3>

<a href="http://www.flickr.com/photos/andrewrighter/8208572495/" title="GoodThopter1x CAN Serial Pinout">
<img src="http://farm9.staticflickr.com/8062/8208572495_61689453f9_n.jpg" width="320" height="179" alt="GoodThopter11 CAN"></a>

<p>The pinout of the GoodThopter1x series is above and since CANH and CANL is located on pins 7 and 2 (respectively) 
the cable you will want to choose is something like this
<a href="http://store.intrepidcs.com/VCAN3-OBDII-MSHSCAN-Cable-p/vcan3-obd.htm"> one</a> and <b>not the Sparkfun model</b> which
has a different pinout for CANH,CANL. Apologies, I think in the future, if it makes sense we will design to the cheaper option after
we test both.</p>



<p>The MCP2551 pads do not extend past the legs. Shorten the legs by
clipping them at their knees or use an SMD rework station to heat the
solder without an iron or use an iron with extra flux and care.</p>
